Proceedings of the Particle Physics and Early Universe
Conference (PPEUC).
For this paper:
postscript
PPEUC CMB index
1 Introduction...
Effect of a Collapsing Cluster on the CMB temperature and Power
Spectrum
Y. Dabrowski, M.P. Hobson, A.N.
Lasenby and C. Doran
Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge,
CB3 OHE, UK
Abstract:
We present a new model for the formation of spherically symmetric clusters in
an expanding Universe. Both the Universe and the collapsing cluster are
governed by the same pressure less fluid equations for which a uniform initial
density profile is assumed. A simple perturbation imposed on the initial
velocity field gives rise to an over-density which closely models real
clusters. The computation of photon paths allows us to evaluate the
gravitational effects imprinted on a Cosmic Microwave Background (CMB) photon
passing through such an evolving mass. We also consider the lensing properties
of collapsing clusters and investigate the effect of a population of such
clusters on the primordial microwave background power spectrum.
PPEUC Proceedings
Mon Jul 7 10:52:41 BST 1997